java.lang.NoSuchMethodError:org.apache.http.client.methods.RequestBuilder.post

线程“main”java.lang.NoSuchMethodError中出现异常： org.apache.http.client.methods.RequestBuilder.post（Ljava/lang/String；）Lorg/apache/http/client/methods/RequestBuilder； 在 org.eclipse.rdf4j.http.client.SesameSession.getQueryMethod（SesameSession.java:701） 在 org.eclipse.rdf4j.http.client.SparqlSession.sendTupleQuery（SparqlSession.java:380） 在 org.eclipse.rdf4j.repository.http.HTTPTupleQuery.evaluate（HTTPTupleQuery.java:49） 在 com.cmclinovations.jps.kb.ontokin.sparqlenpoint.queryRepository（sparqlenpoint.java:92） 在 com.cmclinovations.jps.kb.ontokin.sparqlendopment.main（sparqlendopment.java:49）

在尝试使用以下代码查询RDF4J三元组存储时，我遇到了上述问题

    try {
        Repository repo = new HTTPRepository(serverURL, repositoryID);
        repo.initialize();
        RepositoryConnection con = repo.getConnection();
        try {
            System.out.println("QueryString:\n"+queryString);
            // Export all statements in the context to System.out, in RDF/XML format
            TupleQuery queryResult = con.prepareTupleQuery(queryString);
            // A QueryResult is also an AutoCloseable resource, so make sure it gets
            // closed when done.
            try (TupleQueryResult result = queryResult.evaluate()) {
                json = getResultInJson(json, result);
            }finally{
                // Before our program exits, make sure the database is properly shut down.
                repo.shutDown();
            }
        } catch(Exception e){
            logger.error("Exception occurred.");
            e.printStackTrace();
            throw new OntoException("Exception occurred.");
        } finally {
            logger.info("Successfully performed query");
            con.close();
        }
    } catch (RDF4JException e) {
        logger.error("RDF4JException occurred.");
        e.printStackTrace();
        throw new OntoException("RDF4JException occurred.");
    }

对于HTTPClient，我在项目的pom文件中添加了以下依赖项

    <!-- Use Apache HttpClient as HTTP Client -->
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.3.2</version>
    </dependency>

org.apache.httpcomponents
httpclient
4.3.2

NoSuchMethodError

如果类路径中有不兼容的jar文件，通常会发生。检查

RDF4J

和

httpclient

的兼容性，并且放置

logger.info（“已成功执行的查询”）也很奇怪在您的
finally
块中，假设在引发异常时它将被执行。@Vincz777感谢您的评论。它被更改如下：最后{con.close（）；logger.info（“连接已成功关闭”）；}@Jens我正在尝试使用不同版本的httpclient。如果这个问题消失了，我会通知您的。非常感谢您提供了到依赖项的链接。它适用于httpclient版本4.5.2。我将其更新如下：org.apache.httpcomponents httpclient 4.5.2